Casio GMB2100GD-5AvsMomentum Sea Quartz 30 Eclipse - Combined Listing
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Measurements
Catalog photos are all shot at the same flattering size. These aren't: every case below shares one millimeter scale.
GMB2100GD-5A
Sea Quartz 30 Eclipse - Combined Listing
Diameter
44.4mm
42mm
Thickness
12.8mm
12.6mm
lowest
Water Resistance
200m
300m
highest
MSRP
$600
$329
lowest
Movement
5691
Seiko VS43
Case
4 specsCrystal & Dial
2 specsMovement
1 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
Owners note the Casio GM-S2110BP-5A's strap gets dirty easily but cleans well, and the watch itself resists scratches during frequent wear. Some owners lament the lack of a positive display and find the lume could be brighter. A metal conversion kit is available, transforming the watch into a daily wearer. Overall, owners appreciate the Casio GM-S2110BP-5A for its scratch resistance and the potential for customization via modding kits.
Owners widely praise the Momentum Sea Quartz 30 Eclipse for its solid build, comfortable wearability, legibility, and value, with many noting its tank-like construction and attractive vintage-inspired design. The watch is frequently commended for its good lume, sapphire crystal, and overall fit and finish, with one owner reporting durability over eighteen months of use. The Seiko VS43 solar quartz movement powers the watch. Some owners are split on the second-hand alignment, with multiple reports of it hitting between markers, and a few find the bezel action stiff with some backplay or slipperiness. Overall, owners and reviewers rate the Momentum Sea Quartz 30 Eclipse highly for its fun, vintage-inspired dive watch experience at an affordable price.
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